Stadium: Court 6 Round: 54 Ground: Hardcourt indoor
| ITF M15 St Petersburg Qual | 2021/04/11 11:00 | Daniil Glinka v Alexander Stepin | 6-4,6-3 |
| ITF M15 St Petersburg | 2021/04/08 09:00 | Daniil Glinka v Jan Satral | 4-6,3-6 |
| ITF M15 St Petersburg | 2021/04/06 14:25 | Daniil Glinka v Daniil Golubev | 6-0,6-0 |
| ITF M15 St Petersburg | 2021/04/05 11:00 | Daniil Glinka v Yannik Steinegger | 6-2,6-2 |
| ITF M15 St Petersburg | 2021/04/04 10:05 | Daniil Glinka v Stepan Pecak | 7-5,6-1 |
| Challenger St. Petersburg Qual | 2021/03/07 09:35 | Khumoyun Sultanov v Daniil Glinka | 7-6,6-4 |
| Challenger St. Petersburg | 2021/02/28 09:10 | Daniil Glinka v Skander Mansouri | 6-3,6-7,5-7 |
| ITF M15 St Petersburg Qual | 2021/02/07 12:45 | Daniil Glinka v Chad Kissell | 6-2,4-6,8-10 |
| ITF M15 St Petersburg Qual | 2021/04/11 11:00 | Leonid Sheyngezikht v Alexander Zgirovsky | 6-4,4-6,4-10 |
| ITF M15 St Petersburg | 2021/04/04 13:40 | Igor Trunov v Alexander Zgirovsky | 1-6,6-3,10-7 |
| ITF M15 Kazan | 2021/03/09 06:55 | Alexander Zgirovsky v Pavel Verbin | 6-4,6-7,6-10 |
| ITF M15 Kazan | 2021/03/08 11:15 | Alexander Zgirovsky v Dmitry Dolzhenkov | 7-6,6-3 |
| ITF M15 Monastir | 2021/01/10 12:30 | Paras Dahiya v Alexander Zgirovsky | 6-4,6-0 |
| ITF M15 Monastir | 2021/01/05 09:45 | Wojciech Marek v Alexander Zgirovsky | 6-1,5-7,7-6 |
| ITF M15 Monastir | 2020/12/29 09:30 | Alexander Kotzen v Alexander Zgirovsky | 6-1,1-6,6-1 |
| ITF M15 Monastir | 2020/12/22 08:30 | David Pichler v Alexander Zgirovsky | 7-5,6-2 |